ldd prints misleading error message when failing to print forein executibles

[lolbinarycat]

Describe the bug

if ldd is pointed at a dynamically linked executable for a different but compatible architecture (eg i686), it will claim the executable is not dynamically linked.

Steps To Reproduce

Steps to reproduce the behavior:

$ nix shell nixpkgs#{glibc,file}
$ nix build nixpkgs#pkgsCross.gnu32.hello
$ ldd result/bin/hello
	not a dynamic executable
$ file result/bin/hello
result/bin/hello: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /nix/store/mnn74dhr6fcjl0iv7a1hvwvmyly3lq1a-glibc-i686-unknown-linux-gnu-2.38-27/lib/ld-linux.so.2, for GNU/Linux 3.10.0, not stripped

### Expected behavior
accurate error message

### Additional context
this is probably a glibc bug, but i didn't want to create a whole new account without being sure.

### Notify maintainers

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### Metadata
Please run `nix-shell -p nix-info --run "nix-info -m"` and paste the result.

```console
[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
output here

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